Prevent game server pinger from dying if there's a network interruption; like computer going to sleep

lib/pages/server_browser.rb

@@ -101,7 +101,7 @@ module W3DHubLauncher
         # TODO: Sort servers?
       end
 
-      def handle_game_server_list
+      def handle_game_server_list(payload)
         after(1_000) do
           populate_server_list
         end

lib/worker.rb

@@ -200,6 +200,9 @@ module W3DHubLauncher
             msg = [8, 0, 0, 0, sequence_id].flatten.pack("C2n2A64")
             echo_requests[sequence_id] = { send_time: Time.now, address: server_address, replied: false }
             socket.send(msg, 0, address)
+          rescue Errno::ENETUNREACH
+            # network was unreachable, cleanup
+            echo_requests.delete(sequence_id)
           end
 
           # Receive replies until timeout